86 mustang gt. Stock 5.0 been converted to mass air. Car will start and idle great. Give the car gas and it falls on its face. Can’t even drive it cause it cuts out so bad unless it’s at WOT. Pulled codes and only got emission codes which I’m assuming is due to egr being deleted. Thrown a lot of parts at the car and nothing has seemed to help. Car has new fuel filter, FPR, brand new 19# injectors, all new vacuum lines, plugs , coil, wires, distributor, set TPS, motor has all new gaskets in...

86 5.0 poor performance - under load